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Study of the association between immunoglobulin-G (IgG) subclass deficiency and nasal polyposis.Longitudinal study (5years) in a prospective cohort of 161 nasal polyposis patients. Analysis of the association between humoral immunodeficiency, rhinologic symptoms, endoscopy score and prescribed doses of local and systemic corticosteroids.The prevalence of IgG subclass deficiency was 13.7% (22/161)...
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